Renamed demo modules to be wx-less.

[wxWidgets.git] / wxPython / demo / ListCtrl_virtual.py

diff --git a/wxPython/demo/ListCtrl_virtual.py b/wxPython/demo/ListCtrl_virtual.py
new file mode 100644 (file)
index 0000000..75f5d97
--- /dev/null
+++ b/wxPython/demo/ListCtrl_virtual.py
@@ -0,0 +1,117 @@
+# 11/20/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o Updated for wx namespace
+# 
+# 11/29/2003 - Jeff Grimmett (grimmtooth@softhome.net)
+#
+# o wx.ListItem.GetText() returns a wxString pointer, not the text.
+# 
+
+import  wx
+import  images
+
+#----------------------------------------------------------------------
+
+class TestVirtualList(wx.ListCtrl):
+    def __init__(self, parent, log):
+        wx.ListCtrl.__init__(
+            self, parent, -1, 
+            style=wx.LC_REPORT|wx.LC_VIRTUAL|wx.LC_HRULES|wx.LC_VRULES
+            )
+
+        self.log = log
+
+        self.il = wx.ImageList(16, 16)
+        self.idx1 = self.il.Add(images.getSmilesBitmap())
+        self.SetImageList(self.il, wx.IMAGE_LIST_SMALL)
+
+
+        self.InsertColumn(0, "First")
+        self.InsertColumn(1, "Second")
+        self.InsertColumn(2, "Third")
+        self.SetColumnWidth(0, 175)
+        self.SetColumnWidth(1, 175)
+        self.SetColumnWidth(2, 175)
+
+        self.SetItemCount(1000000)
+
+        self.attr1 = wx.ListItemAttr()
+        self.attr1.SetBackgroundColour("yellow")
+
+        self.attr2 = wx.ListItemAttr()
+        self.attr2.SetBackgroundColour("light blue")
+
+        self.Bind(wx.EVT_LIST_ITEM_SELECTED, self.OnItemSelected)
+        self.Bind(wx.EVT_LIST_ITEM_ACTIVATED, self.OnItemActivated)
+        self.Bind(wx.EVT_LIST_ITEM_DESELECTED, self.OnItemDeselected)
+
+
+    def OnItemSelected(self, event):
+        self.currentItem = event.m_itemIndex
+        self.log.WriteText('OnItemSelected: "%s", "%s", "%s", "%s"\n' %
+                           (self.currentItem,
+                            self.GetItemText(self.currentItem),
+                            self.getColumnText(self.currentItem, 1),
+                            self.getColumnText(self.currentItem, 2)))
+
+    def OnItemActivated(self, event):
+        self.currentItem = event.m_itemIndex
+        self.log.WriteText("OnItemActivated: %s\nTopItem: %s\n" %
+                           (self.GetItemText(self.currentItem), self.GetTopItem()))
+
+    def getColumnText(self, index, col):
+        item = self.GetItem(index, col)
+        return item.GetText()
+
+    def OnItemDeselected(self, evt):
+        self.log.WriteText("OnItemDeselected: %s" % evt.m_itemIndex)
+
+
+    #---------------------------------------------------
+    # These methods are callbacks for implementing the
+    # "virtualness" of the list...  Normally you would
+    # determine the text, attributes and/or image based
+    # on values from some external data source, but for
+    # this demo we'll just calculate them
+    def OnGetItemText(self, item, col):
+        return "Item %d, column %d" % (item, col)
+
+    def OnGetItemImage(self, item):
+        if item % 3 == 0:
+            return self.idx1
+        else:
+            return -1
+
+    def OnGetItemAttr(self, item):
+        if item % 3 == 1:
+            return self.attr1
+        elif item % 3 == 2:
+            return self.attr2
+        else:
+            return None
+
+
+#----------------------------------------------------------------------
+
+def runTest(frame, nb, log):
+    win = TestVirtualList(nb, log)
+    return win
+
+#----------------------------------------------------------------------
+
+
+overview = """\
+This example demonstrates the ListCtrl's Virtual List features. A Virtual list
+can contain any number of cells, but data is not loaded into the control itself.
+It is loaded on demand via virtual methods <code>OnGetItemText(), OnGetItemImage()</code>,
+and <code>OnGetItemAttr()</code>. This greatly reduces the amount of memory required
+without limiting what can be done with the list control itself.
+"""
+
+
+
+if __name__ == '__main__':
+    import sys,os
+    import run
+    run.main(['', os.path.basename(sys.argv[0])])
+